Active star formation regions at the edge of the LMC Bar: NGC 1850 and NGC 1858

Vallenari, A.; Aparicio, A.; Fagotto, F.; Chiosi, C.; Ortolani, S.; Meylan, G.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 2, p. 447-456

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We present UBV Johnson CCD photometry of two young clusters of the Large Magellanic Cloud (LMC), namely NGC 1850 and NGC 1858, which are located at the NW part of the Bar. We determine their reddening, age and slope of the initial mass function (IMF). The age of NGC 1858 is 8 x 106 yr, while that for the majority of stars in NGC 1850 is 70 x 106 yr. In this cluster a younger generation with age of 8 x 106 yr is also present.